hp 3510 deskjet, connected via wi-fi to MacBook Pro running OX 10.7.5

suddenly my computer will not "see" the printer, I recently changed router but I was able to print after the change, the printer is connected to the network the wi fi light is steady on. I have followed all the directions available in the HP web site, including un-installing the printer from my computer, when I attempt to install it the computer doesnt "see" it

If the issue persist, please let me know what the first part of the printers IP address is. It might be 169.254.XXX.XXX, or 192.168.xxx.xxx or 192.168.223.1. If does end with 223.1 please provide the full IP if it does not I only need to know the first 2 segments (yellow and green ) of it.

If the issue persist, please let me know what the first part of the printers IP address is. It might be 169.254.XXX.XXX, or 192.168.xxx.xxx or 192.168.223.1. If does end with 223.1 please provide the full IP if it does not I only need to know the first 2 segments (yellow and green ) of it.

I look forward to hearing from you. Thanks.

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thanks for the advice, I apreciate it, I was finally able to fix the problem by litarelly unplugging, the printer and both the modem and router ac cord from the wal, that fixed it, when I plugged all devices back to the ac the problem went away, finally the computer "saw" the printer. It could have been that the printer was attached to my neighbor's network, not clear, but in any case I am happy that I can print again.